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Thanks for the info everyone. To make a long story short, the engine got revved up to 10,000 rpm for several seconds and immediately therafter had a tapping noise. When I pulled the valve cover I found 1 rocker had about 1/8" play and the top of the valve flush with the retainer. The rocker looks good. Is there a split ring washer which holds the valve in place?




10,000! Might not be a bad idea to check out a few other things (bearings, block, etc). My feeling is that 7000 would be tops unless your using ultra light weight parts, good oiling system, etc.



hyd cam , stock build , the valve train failure happened because of serious valve float which probably happened just under 700rpm unless this was a purpose built motor , meaning super stock or a PS drags contender .

i'd be looking at them ALL , not just that one .

damaged to the piston and valve might have occurred , a leak down test will tell you if the valve is bent and not closing from piston contact .

if its got stock 69 spec pistons i doubt there was piston to valve contact with that piston .040ish in the hole .